package com.example.ssm.a;

public class Test {
    public static void main(String[] args) {
        Business business = new Business();
//        business.setFloppyWriter(new FloppyWriter());
        business.setUsbWriter(new UsbWriter());
        business.saveData();
    }
}

// Business 使用 U 盘存储数据，怎么改？